1. Mem. ASMEMIT Mechanical Engineering, 77 Massachusetts Avenue, 3-470, Cambridge, MA 02139
2. McVicar Faculty Fellow Fellow ASME Pappalardo Professor of Mechanical Engineering,MIT Mechanical Engineering,77 Massachusetts Avenue, 3-445, Cambridge, MA 02139
3. Mobility & Services Laboratory, Nissan Research Center, Nissan Motor Co., Ltd., 1-1, Morinosatoaoyama, Atsugi, Kanagawa 243-0123, Japan